<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<form action="/user/login" method="post">
  <input type="hidden" th:value="${_csrf.token}" name="_csrf" th:if="${_csrf}"/>
  用户名:<input type="text" name="username"/><br/>
  密码:<input type="password" name="password"/><br/>
  <input type="submit" value="提交"/>
  </form>
</body>
</html>